- Settleability Problems and Loss of Solids in the Activated Sludge Process (Wastewater Microbiology Series) by Michael H. Gerardi,  2002-10-08
 - Wastewater Engineering: Collection and Pumping of Wastewater by George Tchobanoglous,  1981-05-01
 - Water and Wastewater Engineering by Mackenzie Davis,  2010-03-22
 - Instrumentation in Wastewater Treatment Facilities - Mop 21 (Water Pollution Control Federation//Manual of Practice) by Water Environment Federation, Task Force on Instrumentation in Wastewater Treatment Facilities,  1993-01
 - Wastewater Microbiology for Operators by Tony Glymph,  2005-02-20
 - Natural Wastewater Treatment Systems (Civil and Environmental Engineering) by Ronald W. Crites, E. Joe Middlebrooks, et all  2005-08-24
 - Wastewater Systems Engineering by Homer Parker,  1975-10
 - Wastewater Bacteria (Wastewater Microbiology) by Michael H. Gerardi,  2006-04-14
 - Wastewater Treatment Plant Design 
 - Handbook of Water and Wastewater Treatment Plant Operations, Second Edition by Frank R. Spellman,  2008-11-18
 - Anaerobic Reactors: Biological Wastewater Treatment Volume 4 (Biological Wastewater Treatment Series) by Carlos Augusto de Lemos Chernicharo,  2007-01-05
 - Handbook of Advanced Wastewater Treatment (Van Nostrand Reinhold environmental engineering series) by Russell L Culp, George Mack Wesner, et all  1978-02
 - Biological Wastewater Treatment (Environmental Science & Pollution) by C. P.L. Grady,  1998-10-01
 - Ecological Engineering for Wastewater Treatment, Second Edition by Carl Etnier, Bjorn Guterstam,  1996-12-20
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